Door-spring



(No Model.)

J. D. SEAGRAVE.

DOOR SPRING.

N0; 366,889. Patented July 19, 1887.

UNITED STATES PATENT OFFI E.

JOHN D. SEAGBAVE, OF VORCESTER, MASSACHUSETTS.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 366,889, dated July 19,188')".

Application filed April 23, 1887.

To ctZZ 1071 0777 it may concern:

Be it known that I, JOHN D. SEAGRAVE, of Vorcester, in the county of\Vorcester and State of Massachusetts, have invented certain new andusefulImprovementsin DoorSprings or Closers, of which the following is aspecifieation.

My invention relates to springs or closers for doors, more particularlysliding doors; and it consists in various features and details,hereinafter set forth and claimed.

Referring to the accompanying drawings, Figure 1 is a perspective viewofmyimproved door spring or closer; Fig. 2,aside view showing it appliedto a door; Fig. 3, asimilar view, but from the opposite side; and Fig.4, a sectional view of the spring or closer, showing the position theparts occupy when the door is opened and closed.

Referring again to the drawings, A represents a door, provided withrollers a a, running upon a track, 6, and supporting the door, as shownin Figs. 2 and 3. Immediately above the sliding door A are two uprights,c 0, between and to the'upper ends of which is pivoted, by a bolt orpin, (Z, a long arm or lever, C, as shown in allthe figures, the saidlever 0 extending downwardly alongside of the door, and has its lowerend passed through a guide, 0, upon the door, as shown in Fig. 3. Thisloop or guide 0 may consist merely of a U shaped staple,or the arm 0maybe arranged to work between two small and preferably groovedfriction-rollers; but in either case sufficient play should be allowedto permit the door to slide freely back and forth without undue frictionbetween the lever O and its guide 6.

The uprights c 0 may be made of wood or metal, advisably the latter, andwill form; preferably, a part of a frame, B, in which the spring orcloser as a whole is mounted. \Vhen made of metal, the arms or uprightsc 0 will be made in a single casting with the other parts of the frameB. It is obvious that the uprights c 0 may, however, be made separatefrom the frame B, and secured above the door in the desired position,the uprights in such case formingapart of the studding, if desired.

At one end of the framingBis an upwardlyextending arm or lug, f, towhich is pivoted a Serial No. 235,886. No model.)

block, D, as shown in Figs. 1, 2, 3, and 4-, said block comprising twoarms, {1 separated to pass upon opposite sides of and clasp the lug f,and it is also provided with lateral arms h h at its upper end. It isnot essential that the block D be provided with two arms, 9, as one willbe found sufficient in some cases where light springs and doors areused. A link or bar, E, is connected at one end to the block I) and atthe other end to the lever O, as shown in all the fignres,while spiralor coiled springs F F are connected at one end to the arms it of block Dand at their other ends to the uprights 0 0.

Owing to the fact that the uprights c c of the framing B, like the armsof the block D, are separated from each other, the lever C and the linkE are permitted to move longitudinally through the framing B as thelever C is swung back and forth upon its pivot.

As the door is slid back the lever O is swung upon its pivot d, as shownby the dotted lines in Fig. 4-, and by means of the link E the block Dis rocked or thrown outward, thereby distending the springs F. As soonas the, hand is removed from the door the spring, drawing upon the blockD, will rock said block inward upon its pivot and, acting through thelink E and lover G, return the door to its normal position.

It is obvious thatinstead of passing the lower end of the lever 0through an eye or loop, 0, the lever may be connected to the door bymeans of a chain or a link.

I am aware that the pivoted block, lever, pitman, and springs havebefore been combined in a door-spring for hinged doors, and of coursemake no broad claim to these features.

Having thus described my invent-ion, what I claim is- 1. In combinationwith a sliding door, a lever pivoted at its upper end and extendingdownward to engage the door, and a spring connected with said lever,substantially as shown.

2. In combination with a sliding door-,as A, an open frame, B, a lever,C, pivoted at its upper end in the frame B, and loosely connected at itsother end to the door, and arranged to swing back and forth through theframe, a rocking block, as D, a link, as F, vided with a guide, as e,framing B, located connecting the block D and the lever G, and abovethesame and comprising uprights c c a spring connected at one end to theblock and lug f, a lever, O, pivoted to the uprights and at the otherend to a fixed part of the c c and engaging the loop or guide upon the 5frame-work. door, a block, D, comprising arms 9 g and h h, 20

i, I 3. In combination with a sliding door, an pivoted to lugf, a linkor bar, E, connecting open framing, as 13, secured in position above theblock D and lever O, and springs F F, the same and comprising uprights ccand lug connected at opposite ends to the arms h hand f, a leverjournaled at the upper end of the uprightsc 0.

IO uprights and engaging with the door, a block, In witness whereof Ihereunto set my hand 25 D, pivoted to the lug f, a link, E, connectingin the presence of two witnesses.. the lever C with the block, and aspring, F, JOHN D. SEAGRAVE. connected at one end to the block D and atWitnesses: the other end to the uprights. PITTS A. LARNED,

15 4. In combination with 'a sliding door pro- EUSTIS B. FULLER.

